This is a simple case for an ESP32 Expansion/Breakout Board. Not so much a case as a guard for the bottom of the board so you don't worry about the contacts on the bottom touching things. It is designed for the ESP32S 38P/V4/Goouuu Expansion Board.

The breakout board is cheaply constructed, it does not appear as though holes are very consistent between boards. The f3d file is included so you can adjust hole locations as needed.

I used two M2x4 screws with washers to secure the board.